Coin Records
Fineness, weight, minting, provenance, and auction results — one record per coin type.
45 coin types
What are you looking for?
Identify a Japanese coin step by step.
Track hammer prices, market trends, and historical price data across all categories.
Track the ITTENDO Composite Index and category-level indices for the Japanese antique coin market.
How to identify fake Japanese antique coins.
The full Sheldon Scale and Japanese grade equivalents.
Request a purchase quote, appraisal consultation, or consignment auction for Japanese antique coins.
ITTENDO — JAPANESE NUMISMATIC ARCHIVE
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About ITTENDO
We collect and preserve records of Japanese coinage — auction results,
classifications, and sources — in a form anyone can verify.
In-Depth Articles
Expert deep-dive columns covering scripts, varieties, and authentication — all in one place.
Auction Records
Accumulated past sale data. Track price trends with market charts.
My Vault
Keep a record of the coins you hold, with their classification and provenance.
Not only the coin itself: its provenance, classification, and movements in the market.
Prices and classifications kept in a form that can be followed back to sources and records.
Materials kept in a form the next collector can find and follow.